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refactor(rule-engine): add proc_sql_param_str/2 to handle sql params

This commit is contained in:
JianBo He 2020-12-25 12:22:31 +08:00 committed by Shawn
parent d628c49f16
commit 9e22f492c7
2 changed files with 19 additions and 0 deletions
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13
apps/emqx_rule_engine/src/emqx_rule_utils.erl
View File

@ -26,6 +26,7 @@
, preproc_sql/1
, preproc_sql/2
, proc_sql/2
, proc_sql_param_str/2
]).
%% type converting
@ -142,6 +143,11 @@ preproc_sql(Sql, ReplaceWith) ->
proc_sql(Tokens, Data) ->
proc_tmpl(Tokens, Data, #{return => rawlist, var_trans => fun sql_data/1}).
-spec(proc_sql_param_str(tmpl_token(), map()) -> binary()).
proc_sql_param_str(Tokens, Data) ->
iolist_to_binary(
proc_tmpl(Tokens, Data, #{return => rawlist, var_trans => fun quote/1})).
%% backward compatibility for hot upgrading from =< e4.2.1
get_phld_var(Fun, Data) when is_function(Fun) ->
Fun(Data);
@ -232,6 +238,13 @@ sql_data(Bool) when is_boolean(Bool) -> Bool;
sql_data(Atom) when is_atom(Atom) -> atom_to_binary(Atom, utf8);
sql_data(Map) when is_map(Map) -> emqx_json:encode(Map).
quote(List) when is_list(List) -> [$', List, $'];
quote(Bin) when is_binary(Bin) -> [$', Bin, $'];
quote(Num) when is_number(Num) -> bin(Num);
quote(Bool) when is_boolean(Bool) -> bin(Bool);
quote(Atom) when is_atom(Atom) -> [$', atom_to_binary(Atom, utf8), $'];
quote(Map) when is_map(Map) -> [$', emqx_json:encode(Map), $'].
str(Bin) when is_binary(Bin) -> binary_to_list(Bin);
str(Num) when is_number(Num) -> number_to_list(Num);
str(Atom) when is_atom(Atom) -> atom_to_list(Atom);

6
apps/emqx_rule_engine/test/emqx_rule_utils_SUITE.erl
View File

@ -110,3 +110,9 @@ t_preproc_sql2(_) ->
{PrepareStatement, ParamsTokens} = emqx_rule_utils:preproc_sql(<<"a:$a,b:b},c:{c},d:${d">>, '?'),
?assertEqual(<<"a:$a,b:b},c:{c},d:${d">>, PrepareStatement),
?assertEqual([], emqx_rule_utils:proc_sql(ParamsTokens, Selected)).
t_preproc_sql3(_) ->
Selected = #{a => <<"1">>, b => 1, c => 1.0, d => #{d1 => <<"hi">>}},
ParamsTokens = emqx_rule_utils:preproc_tmpl(<<"a:${a},b:${b},c:${c},d:${d}">>),
?assertEqual(<<"a:'1',b:1,c:1.0,d:'{\"d1\":\"hi\"}'">>,
emqx_rule_utils:proc_sql_param_str(ParamsTokens, Selected)).